Development of spraying agent for reducing drying shrinkage of mortar

4th International Conference on Competitive Materials and Technology Processes

Fujiwara, Hiromi^1 ; Maruoka, Masanori^1 ; Liu, Lingling^2

Dept. of Civil Engineering, Utsunomiya University, Japan^1

Graduate School of Engineering, Utsunomiya University, Japan^2

关键词: Chemical agent;    Drying condition;    Drying shrinkages;    Early age;    Exposed to;    Shrinkage characteristic;    Water spraying;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/175/1/012061/pdf
DOI  :  10.1088/1757-899X/175/1/012061

来源: IOP

【 摘 要 】

Mortar used to repair is sometimes exposed to drying state in early ages after construction and a few days later water is sprayed frequently on the surface of the mortar in order to prevent cracks. This research studied on shrinkage characteristic of mortar subjected to drying conditions like this. The result showed that the water spraying on the mortar after initial drying did not have any effect to prevent shrinkage, but increased. And it also showed when various chemical agents are mixed and used in watersprayingit had the prevention effect on shrinkage. This report was to understand this kind of phenomenon and clarify the mechanism. In addition, based on the results, the new spraying agent was developed to reduce drying shrinkage.